Under the iTunes in the Cloud section, click Manage Devices. (If you haven't associated any devices with your Apple ID, you won't see the Manage Devices section.) Information about each associated device appears. Next to each device, you can see when it associated with your Apple ID.
The real reason why the burp smells so badly is hydrogen sulfide (H2S). If you eat foods that have sulfur proteins in them then you may find yourself burping the H2S, which will smell like rotten eggs. The sulfur reducing microbes in the intestine digest the proteins and release the gas.
1 When this food starts to ferment, it can cause foul smelly burps. 2  Stinky smell of rotten eggs or that of sulfur, which comes after a burp, is due to a gas formed in digestive tract. 3  It is called hydrogen sulfide gas. 4  The gas is produced when you eat sulfur containing food. Avoid them when you have bad burps. 2  Excess of bile which has a sulfuric taste when present in digestive tract can lead to foul odor belching. 3  This happens when you eat large meal at a time. 4  In order to digest large meal, liver releases large amount of bile in the intestine.